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Tolerance optimization method of feed mechanism

A technology of feeding mechanism and optimization method, applied in the direction of comprehensive factory control, comprehensive factory control, electrical program control, etc., can solve the problems of contradiction between manufacturing quality and cost

Inactive Publication Date: 2012-09-12
NINGBO TENGGONG PRECISION MFG
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the defects of traditional design methods, solve the contradiction between manufacturing quality and cost caused by the tolerance control of the feeding mechanism, and provide a tolerance optimization that can not only ensure the quality of the feeding mechanism but also effectively reduce its processing cost method

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Embodiment Construction

[0038] A feeding mechanism tolerance robust optimization embodiment of the present method invention is described as follows:

[0039] This embodiment is based on the design parameters of the feeding mechanism of a certain type of cold heading machine provided by the enterprise, and its tolerance is robustly optimized.

[0040] (1) The feeding mechanism model can be simplified as a serial combination of two sets of linkage mechanisms, and the simplified model diagram is as follows figure 1 As shown, wherein, rod OA is a crank, which corresponds to the feeding eccentric wheel structure; rocker BCD corresponds to the feeding rocker structure, wherein the length of BD is an adjustment parameter (which can be less than the length of BC) to meet the requirements of different feeding lengths; The rod EF corresponds to the structure of the ratchet rocker arm, and the maximum swing angle that it can achieve in one working cycle determines the length of the feeding.

[0041] (2) In the...

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Abstract

The invention discloses a tolerance optimization method of a feed mechanism. The method comprises the following steps: A, establishing a feed mechanism tolerance-processing cost function model: C(t)=a0e<-a1t>, wherein the C(t) expresses processing cost of a corresponding tolerance t and a0 and a1 are weighting coefficients of different processing cost evaluation functions; B, employing a random simulation algorithm to calculate a correlated statistic characteristic of a feed mechanism quality characteristic according to design parameters of all components of the feed mechanism and initial tolerance data; and C, employing a genetic algorithm to output an optimized tolerance of the design parameters according to the correlated statistic characteristic of the feed mechanism quality characteristic. According to the invention, correlated knowledge of tolerance robustness is employed and a quality-cost balance relation is utilized as a quality maxim for a tolerance robustness optimization design; therefore, it can be ensured that the quality of the feed mechanism has good robustness and processing cost of the mechanism can be effectively reduced, thereby reaching an optimum balance between the product quality and the cost and thus further improving product market competitiveness.

Description

technical field [0001] The invention relates to a quality control optimization method of a feeding mechanism used in the field of mechanical design, in particular to a tolerance optimization method of a feeding mechanism. Background technique [0002] In the actual mechanical design engineering, for the design of various mechanical components, such as the feeding mechanism, due to the influence of manufacturing errors, there is a certain variation between the actual value and the design value of each rod of the feeding mechanism, and the fluctuation of these design parameters will have a certain impact on The result of the deterministic optimal design of the feeding mechanism has certain influences, especially it may reduce the quality of the output characteristics of the feeding mechanism, and then affect the working performance of the entire mechanical equipment. Taking the feeding mechanism of a cold heading machine as an example, in order to improve the quality of the ou...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/418
CPCY02P90/02
Inventor 何红君程竹青戴春祥周晓飞施永康
Owner NINGBO TENGGONG PRECISION MFG
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